4mm banana plugs are used in many industrial equipment, audio and teaching instruments. In addition to the appearance mentioned above, secondly, pay attention to the data of the banana plug. For example, pay attention to whether the current capacity of the plug meets the rated current capacity of the household appliance. The principle is that the rated current of the plug is not less than the rated current capacity of the household appliance.
Symbols to indicate the rated current/or power to guide users to avoid overloading. The banana plug logo or symbol should be durable and legible. Do not use silk screen and paper stickers that can be easily erased. Anti-electric shock protection is a key safety index to ensure that plugs, sockets and converters will not cause electric shock accidents to users and others under normal use, and even some accidents.
When the plug is fully or partly inserted into the socket, the live part of the banana plug should not be touched; any pin of the 4mm banana plug should not be inserted into the live socket of the socket when the other pins are in the accessible state. Plug sockets and converters with protective doors should be able to prevent single poles or probes from being inserted.
There are two types of banana plugs: welding type and welding forming type. The common specifications of 4mm banana plug sheath type are: 2.0mm banana plug (2.0mm Banana Series Plug), 3.5mm banana plug (3.5mm Banana Series Plug), 4.0mm banana plug (4.0mm Banana Series Plug), 5.5mm Banana Series Plug (5.5mm Banana Series Plug), 6.0m.